from xml.dom import minidom
 
#doc = minidom.parse(file)
doc = minidom.parseString("<a>hello</a>")
 
 
print doc.toprettyxml(encoding="utf-8")
 
node=doc.createElement("b")
node.setAttribute("nom","val")
doc.documentElement.appendChild(node)
 
node2=doc.createTextNode("koko")
doc.documentElement.appendChild(node2)
 
 
print doc.toprettyxml(encoding="utf-8")
 
for i in doc.documentElement.childNodes:
    print i,i.nodeType #(i.ELEMENT_NODE,i.TEXT_NODE)
 
for i in doc.getElementsByTagName("a"):
    print "-<A>-",i
 
node.parentNode.removeChild(node)
node2.parentNode.removeChild(node2)
 
print doc.toprettyxml(encoding="utf-8")